For an insert that is rated to heat up to 1200sf and have a maximum burn time of 8 hours, I'm really happy with my 1250. I pretty much use it as the primary heat for my 1155sf house. It's extra impressive if you consider the fact that my insert is located in about the worst possible location for heating the house. I last loaded it today at 12:30 with 2 splits of Douglas Fir and 1 split of alder. When I left at 1:00 I had the air turned down low, the stove-front thermometer was at 450 degrees, and if I looked real hard I could see a tiny bit of smoke coming from the chimney. This is what I had when I got home at 11:00. I've been burning for 3 days straight and haven't had to use any paper to start a fire.